Automatic stop for phonographs



c. B. KERNS AUTOMATIC STOP FOR PHONOGRAPHS.

APPLICATION FILED OCT, 11,1920. I 1,41 1,732. Patented Apr- 4, 1922.

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\ H minTun-B. Karma atlroznu C. B. KERNS.

AUTOMATEC STOP FOR PHONOGRAPHS.

APPLICATION FILED OCT. n. 1920.

1,41 1,7 32. Patented Apr. 4, 1922.

2 SHEETSSHEET Z- Illinnmn B. Kerns UNITED STATES CLINTON B. KERNS, or COPPERHILL, TENNESSEE.

AUTOMATIC STOP FOR PHONOG-RAPHS.

' Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filedOctober 11, 1920. Serial No. 416,066.

To all whom it may concern: 7

Be it known that I, CLINTON Elia-ens, a citizen of the United States, residing at Copperhill, in the county of Polk and State of Tennessee, haveinvented certain new and useful Improvements in Automatic Stops for Phonographs, of which the following is a specification. f

This invention relates to improvements in automatic stops for phonographs.

An important object of the invention is the provision of an automatic stop forphonographs which is extremely simple in construction, while yet functioning to eiiect a positive stop atra predetermined point.

A further object or the improved automatic stop, is the provision oi a stop which can be readily attached to a phonograph, and embodying adjustable means'to make the same. function correctly.

A further object of the invention is the provision of an automatic stop for phonographs, which is adapted to be installed upon that type of phonograph having the tone transmitting arm force ted laterally across the turntable.

Other objects andadvantages of the automatic stop will be apparent during the course of the following detailed description.

In the accompanying drawings forming a part of this specification and in which like reference characters" designate like parts throughout the same, v

Figure l is a plan'view of a phonograph showing the automatic stop attached thereto.

Figure 2 is a fragmentary cross sectional view of a phonograph showing the automatic stopping means attached thereto.

Figure 3 is a fragmentary cross sectional view showing the relation of the tone arm to the stopping mechanism.

Figure 4 is a fragmentary side elevational view of a detailshown in Figure 3.

.in the drawings, wherein for the purpose of illustration is shown a. preferred embodiment of my invention, the letter A designates the phonograph, upon which is mounted. the turn-table B, to rotate a recordU, preferably of the disc type, and which phonograph has embodied therein a tone arm D, preferably of the laterally force fed type, such as the Edison' diamond disc. The automatic stop E is shown associated with the phonograph A for arresting the rotational movement of the turntable when the tone arm reaches a predetermined point.

The phonograph A preferably comprises the side panels 11 formingthe cabinet, and 1 having a platform 12 mounted therein in any suitable manner, which supports the turntable platform'13 in any suitable man ner. The tone arm is of thelateral force fed type, and comprises the reproducer 15 upon which the record engaging point 16 is mounted for the purpose of reproducing sound and transmitting the same through the tone arm D, and into the cabinet (not shown). In the type of tone arm shown in the drawings,"the same does not depend upon the record engaging needle, in order to convey the reprodu'cer laterally across the record, but the tone arm is force fed to assume the positions as'indicated in Figure 1 of the drawingiin full and dotted lines, the depending portion 17 of the tone arm D traversing laterally a curved path such as that shown by the dot and dash line 18 in Figure 1 of the drawings. The tone arm operatinglever-2O is pivotally positioned upon the turntable platform 13, and is pro vided for the purpose of lifting the reproducing needle ofl of the record, for the purpose of swinging the tone arm laterally to assume the idle position as shown'in dotted lines in Figurel of the drawings, this type of lever being employed upon the Edison type of phonographs. A trip lever 21 is likewise embodied upon the phonograph, which is for the purpose of releasi w a brake mechanism (not shown) to arrest rotation of the turn-table B. A suitablestarting lever 22 is likewise positioned upon the turntable platform 13,tor the purpose of checking the brake mechanism to allow rotation of the turn-table.

The automatic stop E comprises a lever arm 25 which is pivotally connected at 26 by a screw, rivet, or the like to the platform 12,. and spaced therefromsby a pillow block 27. The lever arm 25 extends diagonally across the turn-table platform 13, and be neath the turn-table B in order to project slightly at its free end 28 from, the turntable B. An aperture-29 is provided in the projecting end for the connecting of a wire link 30 having the looped end ,31 thereon for the reception of the upstanding ear 32 provided upon the brake trip lever 21. An

indicating arm 33 is provided to be pivotally connected to the lever arm 25 near itspiv oted end 26; and comprises, a port1on 35 7 having the end 36 thereof adapted to overlie upon; An adjustable clamping sleeve 40 is provided to engage about the depending end 17 of the tone arm" D, and is maintained in position, thereupon by a bolt 41, extending through laterally projecting ears 42 of the sleeve. A projecting tooth, or lug 43 is struck from the material forming the sleeve structure 40 and preferably oppositely disposed from the bolted connection. However at this point a suitable tooth or similar projection maybe welded, or soldered to the sleeve 40 to replace the projection'43 if desired.

The sleeve 40 is positioned upon the tone arm, in such a position that the extension tooth 43 thereupon will enga e with one ofthe teeth 38 upon the curve extension 37 of the indicating arm 33, the particular tooth which the projections 43 engages, of course depends upon the position which the pointer section of the indicator arm 33 assumes with respect to the record C.

' In operation, since in the majority of cases where it is preferredto stop a record,

is immediately upon cessation of the selection. Thereupon, the ointed end 36 of the indicator arm '33 won d assume a position directly over the last groove 45 of the record, thus'simultaneously moving the curved extension 37, since the same is integral with the pointer 35. As the tone arm moves over the record, and within the phonograph A, from the starting position as illustrated in dotted lines, in'Figure' 1 of the drawing, the rearward part of the tone arm will traverse a path as designated by the curved dot and dash line 18, Upon the reproducing needle l6'reaching the last groove in the record, the tooth '43 upon the adjustable sleeve 40, willenga'gewith a tooth 38 upon the curved extension 37 and a force'will be exerted through said curved extension 38 directly in line toward the pivot 34, and the lever arm 25 will consequently be shifted slightly, in such manner that the forward end 28 thereof will exert a pull upon the linked connection 30, to trip the lever 31, and release the braking mechanism (not shown) to arrest rotation of the turn-table B, thus stopping the v plalying of the record.

he closer the last groove 45 in the record is with respect to the pivot 46 of the turntable, the greater of course willbe the travel of the tone arm D; and consequently it follows that the farther apart they are the travel of the tone arm will be decreased. In order to insure the stopping of the record after the last groove, when the indicator points to thesame, the curved extension 37 has been struck from such a radius, and pivoted at such a point upon the lever 25, that uponmovement of the indicator or pointer from the pivot 46, successive teeth 38 upon the curved extension 37 will be brought into direct alignment with the extending tooth 43 upon the sleeve 40, which will result in the desired stopping of the record, at any predetermined point for which the indicator is set.

It is'tobe understood that the form of my invention herewith shown and described is to be taken as the preferred example of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims; 7

I claim:

1. In an automatic stop for phonographs, the combination, with a phonograph, comprising a turn-table, a tone arm, and brake trip lever, of a lever arm pivotally mounted on said phonograph and engaging the brake trip lever. an indicator arm pivoted u on said lever arm, and overlying the turn-ta le, and adjustable means carried by said tonearm and adapted to engage said indicator arm at a point in the movement of said tone arm, determined by said indicator arm, for moving the lever arm to operate the trip brake and arrest motion of the turn-table.

2. In an automatic stop, the combination, with a phonograph having a tone arm, a trip brake lever, arotatable turn-table, and a record, positioned upon the turn-table, of a lever arm pivotally connected to said phonograph, a link connectinga free end of said lever arm and said brake trip lever, an indieating arm pivoted to said lever arm, and overlying sald record for assuming various positions thereon, said indicating arm having an extendin arm rigid therewith and projecting latera ly therefrom, and an adjustable projection carried by said tonearm,

and adapted to engage said lateral projection of the indicating arm upon movement of the tonearm to a position determined by said indicator, to move said lever arm to operate the trip brake lever and arrest movement of the turn-table.

In an automatic stop for phonographs, the combination with a phonograph having a laterally force fed tone arm, a turn-table, and a brake trip lever, of a lever arm pivotally mounted u on said phonograph and engaging said bra e trip'lever, an indicator arm adapted to overlie said turn-table, and connected to said lever arm, and adjustable means carried by said tone arm adapted to engage said indicating arm at the end of the lateral movement to move the lever arm and operate the trip lever to arrest movement of the turn-table.

4. In an automatic stop for phonographs, the combination, With a phonograph having a laterally force fed tone arm, a rotatable turn-table, and a brake trip lever, of a lever arm pivotally connected rearwardly of said tone arm to the phonograph, and having its free end engaging said brake trip lever, an indicator arm pivotally connected to said lever arm, and means carried thereby and by said tone arm for engagement to exert a force in a line parallel to said lateral tone arm movement, to move said lever arm for operating the brake trip lever to arrest rotation of the turn-table.

5. In an automatic stop for phonographs, the combination, With a phonograph having a laterally force fed tone arm, a rotatable turn-table, and a brake trip lever, of a lever arm pivotally connected to said phonograph, a link connecting the free end of said lever arm to said brake trip lever, an indicating arm pivotally connected to said leverarm,

comprising a pointer portion adapted to overlie a record, and a curved extension having teeth upon the outer face thereof, said indicating arm adapted to be moved to indicate various parts upon the record, and move successive teeth toward said tone arm, and means carried by said tone arm, adapted to engage a tooth upon said curved extension, When said tone arm has assumed a predetermined position upon the record as indicated by said pointer arm, for exerting a force in direct alignment with the pivot connection of said indicating arm and said lever arm, for the purpose of moving said lever arm to release the brake trip lever, and arrest rotation of the turntable.

6. In an automatic stop for disc record playing phonographs, the combination with a brake, and a force fed tone arm, of means connected to said brake for adjustment to indicate grooves on a disc record being played on said phonograph, and means on said force fed tone arm for moving said first mentioned means to actuate said brake CLINTON B. KERNS. 

